# RSS and Atom feeds (/docs/supported-content/feeds)



eReader Relay supports public RSS and Atom feeds that return valid XML and usable entries.

## Entry selection [#entry-selection]

The first reading-list edition uses the latest existing entry so setup can be tested without waiting
for a future publication. Later editions use entries newer than that list's saved position. Processing
is bounded to a limited number of entries per feed run to keep editions manageable.

## Full content and summaries [#full-content-and-summaries]

* Complete entry content, including common `content:encoded` payloads, is sanitized and used directly.
* A short summary may be replaced by the linked public article when that produces a more complete
  readable chapter.
* If the linked page cannot be fetched, the usable feed content can still be preferred when it is
  sufficient.

## Requirements [#requirements]

* The feed and followed article URLs must be publicly reachable.
* Redirects must remain within safe public destinations.
* The response must fit the service's size and time limits.
* The XML must identify valid feed entries.

HTML pages that merely mention a feed are not themselves feed URLs. Look for the publisher's RSS or
Atom link, often ending in `.xml`, `/feed`, or `/rss`.

For errors while adding or running a feed, see [Feed troubleshooting](/docs/troubleshooting/feeds).